{"id":"DEBIAN-CVE-2026-107778","details":"MIT Kerberos 5 (krb5) through 1.22.2 contains a NULL pointer dereference in make_cred_list() in rd_cred.c that allows authenticated Kerberos clients to crash services by sending mismatched KRB-CRED arrays. Attackers can send forwarded credentials with more tickets than ticket_info entries through gss_accept_sec_context() to crash GSS-API acceptor services, causing denial of service.","modified":"2026-10-09T11:00:06.743326626Z","published":"2026-10-08T21:17:52.630Z","upstream":["CVE-2026-107778"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-107778"}],"affected":[{"package":{"name":"krb5","ecosystem":"Debian:12","purl":"pkg:deb/debian/krb5?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.20.1-2","1.20.1-2+deb12u1","1.20.1-2+deb12u2","1.20.1-2+deb12u3","1.20.1-2+deb12u4","1.20.1-2+deb12u5","1.20.1-2+loong64","1.20.1-3","1.20.1-4","1.20.1-5","1.20.1-5.1","1.20.1-5.1~exp1","1.20.1-6","1.21.2-1","1.21.3-1","1.21.3-2","1.21.3-3","1.21.3-4","1.21.3-5","1.22.1-1","1.22.1-2","1.22.1-2.1","1.22.1-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-107778.json"}},{"package":{"name":"krb5","ecosystem":"Debian:13","purl":"pkg:deb/debian/krb5?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.21.3-5","1.21.3-5+deb13u1","1.22.1-1","1.22.1-2","1.22.1-2.1","1.22.1-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-107778.json"}},{"package":{"name":"krb5","ecosystem":"Debian:14","purl":"pkg:deb/debian/krb5?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.21.3-5","1.22.1-1","1.22.1-2","1.22.1-2.1","1.22.1-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-107778.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}